Real-demand verdict
Nice-to-have
It replaces the workaround of manually resizing players, hunting for extensions, or just tolerating black bars. The pain is real but it is a comfort fix rather than a must-have, and users can churn the moment they switch devices or browsers — hence want, not real.
How it makes money
Users pay a subscription for the paid tier, with a limited free tier as the entry point; billing runs through Stripe. Pricing and billing cadence are not stated in the source.
What old behavior it replaces
Manually resizing players, hunting for browser extensions, or simply tolerating black bars